my drivers side is going too on a 2004/11 e53 3.0d and yup not just an x5 issue, bmw e46 my wife has ALLLL the regulator clips broke, replaced with plastic moulded ones recently but they dont seem to be a good a fit as the originals and the little red clip that holds the glass the guides cannot be tightened too good ......oh man am dreading ripping the x5 door apart.....jeez